Shower Floor Addition Square Cap Converter

ABSTRACT

A method to convert a current round drain structure imbedded within a tiled shower floor with a quadrangular structure includes steps of. Remove drain grate from current round drain structure imbedded within the tiled floor. Insert said quadrangular structure atop the current round drain structure, the quadrangular structure including. A lower section extending downward from the said quadrangular structure a circular cone shaped area defining departure port and a wall section extending upward from the lower section defining wall to contain and hold up a drain grill and a support section extending atop a tile floor outward from the lower section defining horizontal support flanges and the drain grill, square structure having a plurality of holes. Applying bonding layer of thin-set mortar, further including a supplemental tiled shower floor atop, tiled shower floor. Caulking thereby mechanically interlaces the quadrangular structure with a surrounding supplemental tile floor.

CROSS-REFERENCE TO A RELATED APPLICATION

The present application claims priority to and benefit of U.S. Provisional Application No. 63/029,318 filled May 22, 2020, entitled “Shower Floor Addition Square Cap Converter”, the entire content of which incorporated herein by reference.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention generally relates to fixed and adjustable shower floor drains. More particularly, the present invention relates to replacing an existing current floor drain converting and especially to changing the current round drain to a quadrangular drain, thereby mechanically not removing the existing current drain assemblage, concrete and tile.

Description of Related Art

Shower floor drains are frequently round in form. Floor drain assemblages have many forms and functions. The most common drains are fixed or adjustable; comprised of “pvc” plastic body connected to a fixed “pvc” drain pipe. Fixed drains have a sleeve larger than the fixed pipe, with glue applied on the outside of the drain assemblage, slid or inserted over the fixed drain pipe, bonding the two structures, together. Adjustable drains have a similar installation method, having a secondary screw in adjustable top unit.

Shower floors are installed typically by a tile contractor installer via the method of adjusting the shower floor drain assemblage. The first step in adjusting is conducted either by cutting the drain pipe that is glued to the molded drainage pipe, or by screwing or un-screwing the drain unit. The second step is to adjust the height of the drain assemblage in order to provide proper slope from the bottom edge of the floor tile and the drain assembly. The last step involves “mudding”, which is the mixing of sand and Portland cement. Once the “mud” is formed, a semi-level surface is shaped from the edge of the floor drain assemblage upwards towards the tiled wall. This procedure assures that the water gravitates towards the drain in order to assure water does not pool in the shower basin.

Over time, shower floors begin to show stress in the tile, grout joints, and around the drain assemblage. Home owners often decide to replace entire shower floors due to tile staining, tile damage, and the accumulation of mold around the drain's grout joints. In order to replace the tile around the drain, a tile contractor is requested to remove the concrete “mud bed”, and replace the drain assemblage. Additionally, due to changes in taste, square drains are replacing round drains.

There are numerous products on the market for replacing the floor drains. One example is a drain extension, which is a ¼ inch thick “pvc” plastic ring that bolts down to the existing floor drain. After removing the thin metal drain grate the plastic ring provides a new surface for which new tile can be placed on top of the existing shower floor. This product provides a supplementary layer of tile thereby not removing combined parts of the shower floor. Another example is a system of not removing the combined existing tile and mud bed. This involves removing a small area around the drain assemblage, taking out the combined drain assembly, and replacing it with a drain unit. Concrete “mud bed” is set in addition to the removed portions and a new layer of tile is installed on top of the existing tiled shower floor. The last example involves removing concrete “mud bed” and tiles in a small area around the drain, un-screwing the existing current drain, then replacing the drain with a screw-in type drain. After the screw-in drain is installed, new concrete is set and a layer of tile is installed on top of the existing tiled shower floor.

BRIEF SUMMARY OF THE INVENTION

The present invention directed to a shower floor addition square cap converter for and method of creating a second layer of tile on a present shower tiled floor and changing the current round drain to a square drain. The drain addition is quadrangular in shape, thin vertical walls to contain a drain grate, very thin horizontal flanges extending outward from the vertical quadrangular walls, to provide a support plate. Within the vertical walls is a support latent ledge, a thin sloped structured floor, leading to a round drain cone for the water to drain threw the underside of the unit.

There has thus been outlined broadly, some of the features of the invention in order that the detailed description thereof may be better understood, and in order that the present contribution to the art may be better esteemed. There are additional features of the invention that will be described hereinafter.

In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction or to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of the description be compelled to and not be regarded as limiting.

It has been recognized that it would be advantageous to develop a shower floor addition square cap converter that prevents the removal of the existing combined shower floor tile, concrete and current drain assembly, “thereby not bonding”; by means of mechanically interlacing the drain assembly's underside to the current drain.

It has also been recognized that it would be advantageous to develop a shower floor drain addition square cap converter that is easily installed by simply removing the existing round shower drain grate and placing the shower drain addition units underside on top of the existing current shower drain assembly and tiled floor.

It has also been recognized that it would be advantageous to develop a shower floor drain addition square cap converter, which substitutes a round shower drain and converts it to a square drain thereby not removing the current drain assemblage.

It has also been recognized that it would be advantageous to develop a shower floor drain addition square cap converter, which allows an easy installation of an drain cap, by removing the existing drain grate and simply drop in or set into the current drain unit assembly, allowing for a supplementary layer of tile to be installed on the existing tiled floor.

Other objects and advantages of the present invention will become obvious to the reader and it is intended that these objects and advantages are within the scope of the present invention. To the accomplishment of the above and related objects, this invention may be embodied in the form illustrated in the accompanying drawings, attention being called to the fact, it is possible and possible that the drawings are illustrative, and that changes may be made in the specific construction illustrated and described within the scope of this application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top perspective exploded view of the Shower floor addition square cap converter of the present invention;

FIG. 2 is a top view of the Shower floor addition square cap converter of FIG. 1;

FIG. 3 is a side view of the Shower floor addition square cap converter of FIG. 1;

FIG. 4 is a bottom view of the Shower floor addition square cap converter of FIG. 1;

FIG. 5 is a bottom perspective exploded view of the Shower floor addition square cap converter of FIG. 1;

FIG. 6 is a top plan view of the Shower floor addition square cap converter of FIG. 1;

FIG. 7 is a section view of the Shower floor addition square cap converter of FIG. 6, taken along section 7-7 of FIG. 6;

FIG. 8 is a partial cut-away cross sectional upper perspective view of the Shower floor addition square cap converter assembled.

FIG. 9 is a side partial cross section close up view, of the Shower floor addition square cap converter showing in more detail of the embodiment of the shower drain unit and drain grate assembled.

FIG. 10 is a side cross-sectioned view of the drain grate, thereby not showing a detail of the shower drain unit.

FIG. 11 is bottom perspective cross sectional view of FIG. 10, emphasizing the drain grates support.

FIG. 12 is a top perspective exploded view of a further embodiment of the Shower floor addition square cap converter for connecting to the current floor drain, with portions of the adjoining “mud bed” and tiled shower floor, emphasizing the installation process.

FIG. 13 is a top perspective plan view, further emphasizing the installation process of the Shower floor addition square cap converter, current floor drain, with portions of the adjoining “mud bed” and tiled shower floor and a layer of thin set.

FIG. 14 is a side cross-sectioned view of the Shower floor addition square cap converter, existing floor drain, with portions of the adjoining “mud bed” and tiled shower floor and a layer of thin set of FIG. 13, taken along section 14-14 of FIG. 13;

FIG. 15 is a side cross-sectioned closer plan view of FIG. 14 emphasizing the Shower floor addition square cap converter, existing drain unit and drain pipe.

FIG. 16 is a close-up side cross-sectioned view, section 16 of FIG. 15; showing a detailed connection of the Shower floor addition square cap converter to the existing shower drain and drain pipe.

FIG. 17 is top perspective plan view, a continuation of FIG. 13 emphasizing the installation process of the Shower floor addition square cap converter, current floor drain, with portions of the adjoining “mud bed”, existing tiled shower floor, layer of thin set , supplemental layer of tile and drain grate.

FIG. 18 is a close-up top sectioned view, section 18 of FIG. 17; showing the detail of the drain units vertical walls support columns, resting flanges and space for caulking, providing expansion when the drain grate is installed.

DETAILED DESCRIPTION OF THE INVENTION

With reference to the, detailed embodiments of the present invention is simply representatively illustrated in the drawings, and specific language. The aspects of the present disclosure are best understood from the following detailed description with reference to the convoying drawings. For purposes of the description hereinafter, the terms “caulking”, “mud bed”, “mud screed”, “dry pack”, “pvc”, “abs”, “horizontal”, “vertical, “lateral”, “longitudinal” and derivatives thereof shall relate to the invention as it is focused on in the drawing figures. Notice this also, it is to be understood that the invention may undertake numerous alternative variants, where expressly specified to the contrary. It is also to be understood that the specific devices illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments of the invention. Hence, other physical characteristics related to the embodiments disclosed herein are not to be considered as limiting. This invention is best understood by reference to the drawings.

As used, the term “mud bed”, “mud screed”, and “dry pack” is to be understood to refer to a term of concrete. A mixture of sand, Portland cement and water properly mixed, not to wet or not too dry, for allowing the installer to place the mixture on the floor and semi leveling it with a slight slope for drainage.

As used, the term “horizontal”, “vertical”, “lateral”, and “longitudinal”, is to be understood to refer to innumerable shares or features of the drain unit and grill can be extended from or within the drain unit and grill, expressing parts directed to or from the drain unit and grill.

As used, the term “pvc”, “abs”, etc. These terms are generally not intended to be limiting, aside are to most clearly describe the type of plastic used for the drain unit or by the existing drain unit or pipes.

As used, the term “caulking”, is to be understood to refer to a flexible silicon or latex filler, used between two separate specific areas, providing flexibility.

Referring now to drawings and primarily FIGS. 1-9, the embodiment of the Shower floor addition square cap converter 10 encompasses two main parts of this invention; a quadrangular drain form configuration 14 made of injected molded “abs” polymer plastic and a drain grill with a distinctive geometric pattern 12, composed of polished aluminum. The quadrangular drain form configuration 14, encompasses of a thin horizontal support flange 16 extending horizontally outward from the square structure form ledge 18, half round vertical support pins 20, providing strength and area for caulking of the vertical thin walled collar 22 for accommodating the drain grill with a distinctive geometric pattern 12, an interior support ridge 24 at the interior base of the vertical thin walled collar 22 providing an latent place for the drain grill with a geometric pattern 12, base of the quadrangular drain form configuration 14. A continuation at the base of the interior support ridge 24, corresponding corners of the square structure, one degree sloping areas 26, leading to a continuing sloping cylindrical drain area 28 with a greater sloped area, leading to the final cylindrical drain cone 30 providing for an exit area of the drain water.

Shown in FIGS. 2-4, provides a top, side and bottom view of Shower floor addition square cap converter 10, FIG. 2 demonstrates the design of the drain grill with a distinctive geometric pattern 12, illustrating the configuration of the random sized drain holes 32 and the thin horizontal support flange 16 extending out from the vertical thin walled collar 22 of FIG. 3. The side view expressed in FIG. 3 shows in better detail the quadrangular drain form configuration 14, one degree sloping areas 26, leading to a continuing sloping cylindrical drain area 28 and the vertical thin walled collar 22 that hold the drain grill with a distinctive geometric pattern 12 within, and half round vertical support pins 20, providing strength to vertical thin walled collar 22. FIG. 4 the bottom view shows the drain grill with a distinctive geometric pattern 12 with partial view of the random sized drain holes 32 of the drain grill with a distinctive geometric pattern 12, and the one degree sloping areas 26.

Shown in FIG. 5 an embodiment of the Shower floor addition square cap converter 10 gives a better bottom perspective view of the drainage cone 30, tapered end rim 36 emphasizing the bottom portion of the quadrangular drain form configuration 14 and drain grill with a distinctive geometric pattern 12 with half-moon support ridges 34 under the drain grill with a distinctive geometric pattern 12, providing strength and stability. The half-moon support ridges 34 are curved vertical extrusions of the drain grill with a distinctive geometric pattern 12, mounted between the drain grill holes 32.

FIG. 6 shows a top view detail plan for FIG. 7 detailing the exploded cut section of the Shower floor addition square cap converter 10 section line 7-7 of FIG. 6 cuts through the center line illustrating in FIG. 7, emphasizing in better detail the quadrangular drain form configuration 14 the thin horizontal support flanges 16 as mentioned in FIGS. 1-4. Thin horizontal support flanges 16, acts as a chasse or extensions, enabling the quadrangular drain form configuration 14 to be placed atop the existing shower floor 54 and over the current shower drain 48 stated in FIG. 12. Also in better detail of the cylindrical drain area 28, shows how the sloping starts from a gradual area downward to a cliff like drop off to the drainage cone 30 and to the drain tapered end rim 36. The drain grill with a distinctive geometric pattern 112 shown is a fundamental part of material, “Aluminum formed” with the drain holes 32 in FIG. 6 and with half-moon support ridges 34.

Shown in FIGS. 8-9 are perspective and up-close partial cross-sectional view of Shower floor addition square cap converter 10 in its installed configuration, were the drain grill 12 resting within the vertical thin walled collar 22 of FIG. 8 again emphasis on FIGS. 8-9 show a better appreciation of the quadrangular drain form configuration 14, illustrating the sloping cylindrical drain area 28 and the circular almost vertical drainage cone 30, providing an area for the waste water to drain. Focusing on FIG. 8 illustrates the thin horizontal support flange 16 acts as a casse extending out from square structure form ledge 18. which provides an area for “Caulking”, a flexible silicone or Latex filler to allow the vertical thin walled collar 22 flexibility outward when the drain grill 12 is inserted to the quadrangular drain form configuration 14 as the vertical thin walled collar 22 are very thin, half round pins 20 are spaced apart by one inch intervals combined to, surround the vertical thin walled collar 22. Random sized drain holes 32, illustrates a non-uniform hole pattern, creating a unlike pattern of holes for drainage of shower waste water to be referenced in the invention.

Reference to FIGS. 10-11, the drain grill unit 50 will recognize the features and embodiments of the drain grill structure 38 features. Starting with the upper surface 48, FIG. 10, having a slight downward “bowl” or curved arc allowing the water to drain better. Random sized drainage holes 40 spaced in a geometric pattern, with half-moon support ridges 42 located “below” or bottom of the grill structure 38 spanning three quarters of the total distance from edge to edge of the distance, centered and curved to allow Random sized drainage holes 40 to drain appropriately thereby not interfering and specifically to the feature, adding strength to the drain grill structure 38. To provide rigidity. The half-moon support ridges 42 shown in FIG. 10 show the structure below the drain grill structure 38 having a downward curve extending outward, thicker in the center and tapered to a thinner finish, were the edges are tapered 44.

Reference to FIGS. 12-18, provides an upper perspective and detail sections represented view, steps and process of drain unit installation 60. Shower drains have a drain pipe 52, commonly comprised of “pvc” type plastic were the waist water exits. Attached by glue “a specific type of glue used with pvc pipes” to it is a current round shower drain structure 48 entrenched by concrete “mud bed” 54 surrounded by a tiled shower floor 56 for drainage to the shower current drain structure 48.

FIG. 12 primarily illustrates an exploded view, three purposes of the drawing. One; the existing shower floor assembled parts represented in the drain pipe 52, round current drain structure 48, concrete “mud bed” 54, and surrounded by a tiled shower floor 56. Second; the quadrangular drain form configuration 14 as shown in FIGS. 1-9, is lowered over and inserted into the round current drain structure 48 creating and converting the current drain structure to a square assembly. And finally third; the drain grill 12 as shown in FIGS. 1-9 is inserted into the quadrangular drain form configuration 14.

FIGS. 13-14 show another representation of the steps and process of drain unit installation 60. FIG. 13, a detail upper perspective view illustrates the two parts; first, the drain pipe 52, round current shower drain 48, concrete “mud bed”54, tiled shower floor 56; Second, quadrangular drain form configuration 14 FIGS. 1-9 and the grill structure 38. Additionally, FIG. 13 provides a detail plan for FIG. 14 itemizing the cut section through the center line of FIGS. 2-4 of the quadrangular drain form configuration 14, drain pipe 52 and round shower drain 48 section line 14-14 of FIG. 13.

FIG. 13, Second step and process of drain unit installation 60 as represented in FIG. 12 , shower floors have a drain pipe 52 commonly comprised of “pvc” type plastic were the waist water exits. Attached by glue to it is a round current shower drain structure 48 entrenched by concrete “mud bed”54 and surrounded by a tiled shower floor 56 for drainage to the current shower drain structure 48, thin-set 58 is applied on top of the existing tiled shower floor 56 and around the quadrangular drain form configuration 14, providing a bonding surface and help to lock in the quadrangular drain form configuration 14. This process can be performed thereby not removing the tiled shower floor 56 simply left in place.

FIG. 14 illustrates specifically the steps and process of drain unit installation 60, more importantly showing how the quadrangular drain form configuration 14 fits into the current round shower drain structure 48 and drain pipe 52 imbedded in the concrete “mud bed”54 and tiled shower floor 56, quadrangular drain form configuration 14 is slid into the internal section of the pipe 52 and resting on the current round shower drain structure 48, the quadrangular drain form configuration 14 can be secured either by simply inserting, rotating it left or right, to adjust it so it looks parallel with a wall and being secured temporarily by the thin-set 58 , following by the additional tile layer 62 FIG. 17, thereby mechanically interlace the quadrangular drain form configuration 14 or caulking the outside of the quadrangular drain form configuration 14 at the base, inserting it into the inside portion of the drain pipe 52, allowing the caulking to dry, thereby mechanically interlace the quadrangular drain form configuration 14, followed by a thin-set layer 58 on top of the existing shower tiled floor 56.

FIGS. 15-16 are close up section views of the current round shower drain structure 48 and the shower floor addition square cap converter (see e.g. FIG. 13 section 14-14) of the process of the step and process of drain unit installation 60. FIG. 15, a detail section drawing representing the focalized detail 16, the current round shower drain structure 48 installed or slid into the existing drain pipe 52 a common method of installation. The quadrangular drain form configuration unit (see e.g. FIGS. 1-9, 14) shows inserted into the existing drain pipe 52 and the horizontal support flange 76, acts as a chasse or extensions leading outward from the square structure also (see e.g. FIGS. 1-9, 16) seated on the current round shower drain structure 48, as the horizontal quadrangular drain form configuration unit 14 is inserted into the existing drain pipe 52 and the current round shower drain structure 48 , the space or tolerance area 72 an narrow thin area were caulking is applied prior to the installation, holding the quadrangular drain form configuration unit 14 from moving or rotating around existing drain pipe 52 prior to the next step of the, steps and process of the drain unit installation 60, also an empty a space providing for calking 74 between the area of the quadrangular drain form configuration unit 14 and the current round shower drain structure 48 provides a space or area were caulking can be installed allowing the quadrangular drain form configuration unit 14 to be bonded with the current round shower drain structure 48.

FIG. 16 is an auxiliary, up close detail section FIG. 15 detail 16, steps and process of drain unit installation 60. Focusing on three main items. First; how the drain grill 12 sits on the quadrangular drain form configuration unit 14 showing the detail and tight tolerance 78, holding the drain grill 12 in place with the quadrangular drain form configuration unit 14 and current round shower drain structure 48. Second; the current drain pipe 52 and the current round shower drain structure 48, circular in shape, provided an area for a round grill to be inserted, bolted or screwed down, after it is removed it now provides a resting place, or sill area for the quadrangular drain form configuration unit 14 to rest on. Third: Now a very narrow space 1 mm thick between the drain form 14 and drain pipe 52 and current round shower drain structure 48 providing for calking 74 is evident, to hold and support the quadrangular drain form configuration unit 14 from moving or rotating, thereby mechanically interlace with the current drain pipe 52.

Referring to FIG. 17, Example of the step and process of drain unit installation 60 completes the installation process of the assembled parts, the quadrangular drain form configuration 14 and its drain grill 12 assembled, resting on the current round shower drain structure 48, that is bonded to the drain pipe 52, as the quadrangular drain form configuration 14 rests on the existing tiled shower floor 56 and current round shower drain structure 48, the quadrangular drain form configuration 14 is locked in or cemented in by the layer of thin-set 58 and a supplemental layer of tile 62, cut around the quadrangular drain form configuration 14 and installed or placed on top of the thin-set 58 proceeded by grouting the tile, quadrangular drain form configuration 14. Also illustrated is a focalized detail 18, showing a better up close view of the quadrangular drain form configuration 14 and its surrounding parts.

Shown in FIG. 18 detail section 18 drawing FIG. 17 an embodiment of the step and process of drain unit installation 60, focusses primarily on the correlation between the quadrangular drain form configuration 14 sandwiched between the existing tiled shower floor 56, layer of thin-set 58 and the supplemental layer of tile 62, installed on and imbedded in concrete “mud bed” 54. Also showing in great detail the quadrangular drain form configuration 14, vertical thin walled collar 72 with the half round support pins 66 and a 2 mm horizontal spacing ledge 64, keeping the supplemental layer of tile 62 separated from the drain grill 12, providing the space for caulking 64, sealing the two structures together. Secondary shown is the drain grills 12 drainage holes 68 showing a better perspective.

It is to be understood what has been described and illustrated herein is a embodiment of the invention along with some variations. The terms, descriptions and figures used herein are set forth by way of illustration solely and are not meant as limitations. Those skilled in the art will recognize that many variations are possible within the essence and range of the invention in which combined terms are meant in there broadest, reasonable sense unless otherwise indicated. Any headings utilized within the description are for convenience solely and have no legal or limiting effect. 

1. A shower drains system comprising: A quadrangular structure device to, sustain and fix a drain grill, said quadrangular structure to fit into a current round drain structure entrance port imbedded within a tiled shower floor, the quadrangular structure including. a lower section extending downward from the said quadrangular structure a circular cone shaped area defining departure port; and a wall section extending upward from the lower section defining wall to contain and hold up the drain grill; and a support section extending atop a tile floor outward from the lower section defining horizontal support flanges; and the drain grill, square structure having a plurality of holes.
 2. The shower drains system of claim 1, wherein the said quadrangular structure, base of an interior support ridge at corners of a square said wall section one degree sloping areas leading inward to a continuing sloping cylindrical drain area with a greater sloped area, furthermore leading to the circular cone.
 3. The shower drains system of claim 1, wherein the said quadrangular structure, and vertical thin walls extending up from base said quadrangular structure.
 4. The shower drains system of claim 1, wherein the said quadrangular structure provide a latent place on which to accommodate, sustain and fix the drain grill.
 5. The shower drains system of claim 4, wherein the latent place an interior support ridge at base of the said drain structure vertical thin wall.
 6. The shower drains system of claim 3, wherein vertical thin walls exterior a plurality of half round vertical support pins furthermore providing strength and spacing operable to caulking thereby mechanically interlace the drain structure within a surrounding supplemental tile floor.
 7. The shower drains system of claim 1, wherein horizontal support flanges extending outward from the said drain structure.
 8. The shower drains system of claim 7, wherein thin horizontal support flanges acts particularly as a chasse and extension, enabling the said drain structure to be placed top of an existing shower floor furthermore over the existing shower drain.
 9. The shower drains system of claim 1, wherein drain grill configured with a slight downward curved arc upper surface furthermore a plurality of drain holes spaced in a distinctive geometric pattern.
 10. The shower drains system of claim 1, wherein drain grill lower surface configured with plurality of ridges spanning furthermore adding strength.
 11. A method to convert a current round drain structure imbedded within a tiled shower floor with a quadrangular structure includes steps of. A. Remove drain grate from the current round drain structure imbedded within the tiled floor. B. Insert said quadrangular structure atop the current round drain structure, the quadrangular structure including. A lower section extending downward from the said quadrangular structure a circular cone shaped area defining departure port; and A wall section extending upward from the lower section defining wall to contain and hold up a drain grill; and A support section extending atop a tile floor outward from the lower section defining horizontal support flanges; and The drain grill, square structure having a plurality of holes. C. Applying bonding layer of thin-set mortar further including a supplemental tiled shower floor atop said tiled shower floor. D. Caulking thereby mechanically interlaces the quadrangular structure with a surrounding supplemental tile floor. E. Insert the drain grill atop said quadrangular structure.
 12. The method of claim 11, wherein creating atop second layer of tile on an existing shower tiled floor and said current round drain structure.
 13. The method of claim 12, wherein convert thereby changing said current round drain structure to a said quadrangular structure.
 14. The method of claim 11, there have heretofore insert said quadrangular structure atop whereby underside circular drain cone fits into said current round drain. 